Arguably the main character of this comic (as that role seems to flip and flop), Kas is perhaps the most powerful Guardian alive. She has a very strong psychokinetic ability that allows her to create pure energy using only her mind/willpower. This energy can be manipulated in many different ways, formed into weapons or thrown as spells. Her weapon of choice is a sword formed of this energy.

She sure doesn't act like the most dangerous agent the Guardianship possesses. Kasashi would like nothing better than to be normal, but finds it difficult to juggle her freshman year of college, boyfriend and possible social life with saving the world.

As a child she was adopted by Ikue after the murder of her family (the details of which will be explained in one of those plot-revealing flashbacks). Such an upbringing has given her a very clear view of right/wrong, good/evil...or at least she thinks so. Kasashi is generally polite and even tempered, but we don't suggest pissing her off. Her control over her power is unpredictable at best, and things tend to explode when she gets angry.